package com.lewis.core.utils;

import java.io.PrintWriter;
import java.io.StringWriter;

import org.apache.commons.lang3.exception.ExceptionUtils;

/**
 * 错误信息处理类。
 *
 * @author Lewis
 */
public class ExceptionUtil {

	/**
	 * 获取exception的详细错误信息。
	 *
	 * @param e
	 * @return String
	 */
	public static String getExceptionMessage(Throwable e) {
		StringWriter sw = new StringWriter();
		e.printStackTrace(new PrintWriter(sw, true));
		return sw.toString();
	}

	public static String getRootErrorMessage(Exception e) {
		Throwable root = ExceptionUtils.getRootCause(e);
		root = (root == null ? e : root);
		if (root == null) {
			return "";
		}
		String msg = root.getMessage();
		if (msg == null) {
			return "null";
		}
		return StringUtil.defaultString(msg);
	}
}
